Dreamworld CEO addresses media

New Year 2016: How Australia celebrated

Bold, bright and colourful fireworks displays helped revellers around the country ring in the new year.

A female police officer was struck in the head by a bottle at a service station at Shalvey in the city's west about 1am. She received a cut to her forehead that required stitches, a NSW police spokeswoman said. A male was taken into custody over the incident.

Police arrested a Dover Heights man who allegedly issued a bomb threat in a Military Road park on the North Shore about midnight. The man was taken to Waverley Police Station and will likely be charged with public mischief, police said.

Officers also broke up a number of brawls in Leichhardt and Balmain in Sydney's inner-west just after midnight. A 21-year-old Leichhardt man who allegedly threw a bottle at a police vehicle was required to attend court.

Police had made 30 arrests, half of them drug related, at the end of their New Year's operation, the largest operation police undertake each year.